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Jacob Quincy Green-painted Surveyor's Compass, New York, 18th century, 5 1/4-in. printed paper
Jacob Quincy Green-painted Surveyor's Compass, New York, 18th century, 5 1/4-in. printed paper dial with fleur-de-lis representing nort Jacob Quin...
18th Century Brass Cased Alidade or Patent Plane, France, black-enameled brass instrument with
18th Century Brass Cased Alidade or Patent Plane, France, black-enameled brass instrument with removable outer case, single-draw eyepie 18th Centu...
Brass Pocket Sextant by Cary and a Boxwood Gunter's or Gunner's Rule, 19th century, 3-in. brass
Brass Pocket Sextant by Cary and a Boxwood Gunter's or Gunner's Rule, 19th century, 3-in. brass instrument marked Cary London, with sil Brass Pock...
Box or Pocket Sextant and Proportional Divider by Fraser & Son, c. 1840, Bond Street, London, 2 3/
Box or Pocket Sextant and Proportional Divider by Fraser & Son, c. 1840, Bond Street, London, 2 3/4-in. dia. lacquered brass sextant wi Box or Poc...
J.D. Potter Anodized Brass Sextant, London, mid-19th century, brass arc with silvered scale marked
J.D. Potter Anodized Brass Sextant, London, mid-19th century, brass arc with silvered scale marked 0-160, pierced frame engraved Potter J.D. Potte...
Spencer Browning and Rust 12-inch Ebony Octant, London, 19th century, bone scale calibrated 0-95,
Spencer Browning and Rust 12-inch Ebony Octant, London, 19th century, bone scale calibrated 0-95, brass index arm with vernier, sightin Spencer Br...
Maison Lerebours and Secretan 2 1/2-inch Telescope, Paris, France, 19th century, with a 41-in.
Maison Lerebours and Secretan 2 1/2-inch Telescope, Paris, France, 19th century, with a 41-in. leather-wrapped main tube, rack-and-pini Maison Ler...
Secretan 6-inch Refractor Telescope, Paris, 19th century, the 70-in. brass main tube engraved on
Secretan 6-inch Refractor Telescope, Paris, 19th century, the 70-in. brass main tube engraved on ocular collar Secretan Paris, rack-and Secretan 6...
Maison Lerebours and Secretan 3-inch Refractor Telescope, Paris, second half 19th century, 41-in.
Maison Lerebours and Secretan 3-inch Refractor Telescope, Paris, second half 19th century, 41-in. brass main tube engraved on ocular co Maison Ler...
Thomas Short 3-inch Reflecting Library Telescope, London, late 18th century, 18 1/2-in. brass main
Thomas Short 3-inch Reflecting Library Telescope, London, late 18th century, 18 1/2-in. brass main tube engraved on the ocular end Thom Thomas Sho...
3-inch Alvan Clark & Sons Telescope Tube Assembly, Cambridge, Massachusetts, brass 40-in. main
3-inch Alvan Clark & Sons Telescope Tube Assembly, Cambridge, Massachusetts, brass 40-in. main tube with ocular end engraved as above a 3-inch Alv...
Gundlach Optical Co. 5 1/2-inch Brass Refractor Telescope, Rochester, New York, c. 1900, 52-in.
Gundlach Optical Co. 5 1/2-inch Brass Refractor Telescope, Rochester, New York, c. 1900, 52-in. brass main tube engraved on ocular coll Gundlach O...
Adams Solar Projection Microscope, England, 19th century, lacquered brass instrument signed Adams
Adams Solar Projection Microscope, England, 19th century, lacquered brass instrument signed Adams London on the fixed plate, two bow-sh Adams Sola...
Unsigned Gould-type Botanical Field Microscope, c. 1830, lacquered brass instrument with rack-and-
Unsigned Gould-type Botanical Field Microscope, c. 1830, lacquered brass instrument with rack-and-pinion focusing on the stage, single Unsigned Go...
John Browning Binocular Microscope, 63 Strand, London, No. 714, lacquered brass instrument with
John Browning Binocular Microscope, 63 Strand, London, No. 714, lacquered brass instrument with rackwork focus, signed as above on main John Brown...
R. Couchoix Monocular Microscope, Paris, first half 19th century, lacquered brass instrument with
R. Couchoix Monocular Microscope, Paris, first half 19th century, lacquered brass instrument with round post and hinged arm connecting R. Couchoix...
Swift & Son Binocular Microscope, 81 Tottenham Court Rd., London, lacquered brass tubes with
Swift & Son Binocular Microscope, 81 Tottenham Court Rd., London, lacquered brass tubes with diagonal rackwork focus, rack-and-pinion h Swift & So...
Unsigned Inverted Chemical Microscope, late 19th century, horizontal screw-mount objective tube
Unsigned Inverted Chemical Microscope, late 19th century, horizontal screw-mount objective tube mounted on a rectangular pillar with fi Unsigned I...
J. Howie Disassembled Binocular Compound Microscope, 76 Nethergate, Dundee, Scotland, 19th century, binocular tubes with horizontal foc J. Howie D...
Nachet et Fils Field Microscope, rue Serpente, 16, Paris, portable brass case with integral sliding lid that holds three lenses, and do Nachet et ...
"The New Novelty Microscope," patented 1864, small, cylindrical, brass hand-held microscope for
"The New Novelty Microscope," patented 1864, small, cylindrical, brass hand-held microscope for entomology with a manual adjustable cen "The New N...
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